Magnetic ore-separator.



No. 832,642. PATENTED OCT. 9, 1906. H. H. WAIT.

MAGNETIC ORE SEPARATOR. APPLIOATION FILED MAR.20,1906.

2 SHEETS-SHEET 1.

MM? figs No. 832,642. PATBNTED OCT. 9, I906. H. H. WAIT.

MAGNETIC ORE .SEPARATOR.

2 SHEETSSHEET 2v APPLICATION FILED MAR 20 1905 UNITED STATES PATENTOFFICE.

SEPARATOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

MAGNETIC oRE-sEPAn 'roR.

Specification of 1.6mm Patent.

Patented Oct. 9, 1906,

To all whom it may-concern.-

7 Fig. 1. Fig. 3 is'a'sectional plan View. Fig.

- tions which Be it known that I, HENRY H. WAIT, a citizen of the UnitedStates, residing at Chicago, in the-county of Cook and State ot-Ilhnois,have invented a certain new and useful Improvement in MagneticOre-Separators, WhlCh the following is a full, clear, concise, and exactdescription.

My invention relates to a ma etic separator; and its object is to rovi ea simple, eflicient, and economical orm of machine which may be workedeither with dry ore or in a liquid medium and in which the material tobe treated will be subjected to the action of an intense magnetic fieldof considerable extent in such a manner that themagnetically-susceptible particles will be effectively re- 'moved andnot entrained with the nonmagnetic material.

The invention further contemplates means for preventing non-magneticmaterial from being entrained and carried along with the magneticarticles.

I will escribe my invention particularly by reference to theaccompanying drawings,

and the parts, improvements, or combina- In the drawings, Figure tionalelevation of -'the' machine. F1 2 1s also-a vertical sectionalelevation,' uti'is taken on a plane atright angles to that of 4 isadetailview-of a portion of the armaturesurface, showing teeth of a formes ecial-1y adapted to this'type of machine; an Fig. 5

is a detail sectional view showing another form of working surface forthe armature designed to prevent non-magnetic particles upon a su frombeing-entrained by the magnetic particles adhering to thearmature-surface. letters of reference designate the same parts whereverthey are'shown.

. The machine is of a: general t separatin -cylinder .is'iarrangetoqrevolve staritially 'vertical axis a magnetpole beingapplied to theface of the cylinder andzthe'material to be separated being fed into theair-gapbetween the magnet-pole and the ,cylinder, the magnetic particlesbeing carried around in the rotation of said cylinder and discharged ata region circumferentially distant from the place of discharge of thenon-magnetic material.

I regard as novel will be pointed out in the appended claims. V I

1, is a vertical sece in which a.

tion of the non-magnetic material from'being Referring to the drawings,13' is the cylindrical armature mounted to rotate u on a vertical axisbetween the oles N of a powerful magnet M, the po eieces of said ma etbeing rovided' with eld-windings W to WhlO an electric current may besupplied from any suitable source. The armature B is laminatedtransversely to its axis of rotation in order to prevent eddy-currentsand to permit it to turn in the intense magnetic fiel with a minimumexpenditure of energy.

Troughs or hoppers C C are arranged to receive the materia to beconcentrated and to direct the same between the magnet-poles N and S andthe surface of the revolving armature, and the products are collected atthe bottom in the discharge chutes D D, E E, and F F. It is intendedthat the magnetically-permeable particles shall be attracted to thesurface of e armature B and adhere to said armature in its rotationuntil it reaches the neutral zone between the two opposin pole-pieces,where it will be released and wil all into the discharge-chutes F F. Thearmovements-first, the downward movement due to gravity; second, theinward move- "mentjtoward the surface of the armature un- Atil they:adhere thereto, and, third, the cir-;

cumferential movement "due to the rotation of the armature. To these maybe added, fourth, the final release and falling down into thecollecting-chute. The non-magnetic ma- It will be seen that or proections'upon which the terial, on the other hand, tends to fall directlydown. Centrifugal force tends to keep the non-magnetic material thrownout and clear of the armature-drum.

In order to prevent any considerable porentrained with the magneticmaterial and carried around therewith in the rotation of the cylinder,the surface of the cylinder may be made smooth mechanically by fillingthe\ spaces between the teeth or projections with non-magnetic material.In Fig. 4, however, a form of tooth or proiection is illustrated whichwould be es ecial y advantageous, the

surfaces being inc ed at so steep an angle that .particles which are notpositively held on by magnetic attraction wil find no places to lodgeand will fall off. It will be noted that the teeth in Fig. 4 are in theform of pyramids pointing'ldownwardly and arranged so as to resent s arpedges to the falling material, t e pyramids being in staggered rows, sothat the material cannot escape the lines of force concentratin upon theedges thereof.

In Fig-5 I have i lustrated the toothed surface provided with an unevenfilling of nonmagnetic material forming inclined ledges which projectslightly above and beyondthe points of the teeth or projections. Inother words, the point of the tooth comes to the surface on that portionof the physical surface of the armature which slopes inward, or on theunder side of the rojecting ledge of nonmagnetic material. adhering tothe points of the teeth are thus shielded to a certain extent from thefalling non-magnetic particles, to avoid collecting such non-magneticparticles above them. The sloping surface of the non-magnetic ledges aretoo steep to allow the material to rest thereon, but the magneticparticles are drawn toward the points of the teeth which come to thesurface on the under sides of such ledges.

A considerable advantage results from the arrangement of thearmature-cylinder between opposed pole-pieces of opposite olarity inthat the magnetic attraction on t e armature is approximately balanced,and neutral points are established on the surface of the armaturebetween the opposing oles, at which oints the attracted matena will berelease and not carried clear around. By arranging the cylinder torotate u on a vertical axis instead of horizontally bot the air-gapsbetween the cylinder and the magnet-poles may be utilized for thepassage of material, so that none of the magnetizing force is wasted onthe idle air-gap.

It will' be understood that the drawings herewith presented are more orless diagrammatic in character and that various modifications may bereadily made by those skilled he magnetic particles in the art withoutdeparting from the constructionaldprinciples indicated.

Having escribed my invention, I claim as new, and desire to secure byLetters Patent, the following:

1. In a magnetic separator, the combination with a separating-armaturebuilt up of toothed laminae, the teeth of said laminae being arranged invertical rows, of non-magnetic material in the space between said teeth,said material forming inclinedledges projlelcting above and beyond theends of said teet 2. In a magnetic separator, a separatin element havingan approximately vertica ore-carrying surface arranged to movelaterally, and provided with permeable ma netic projections, andnon-magnetic materia covering said surface and forming inclined led 'esupon said surface projectin above and eyond the ends of said permea lerojections.

3-. In a magnetic separator, t e combination with an ore-carrierrevolving on a substantially vertical axis, said carrier being built upof transverse laminae, said laminae having teeth for causin convergencesof magnetic flux at the peri Irery of the carrier, a non-magneticfilling etween 'said teeth, said material forming inclined ledgesprojecting above and beyond the ends of. said teeth, a magnet-polefacing said carrier, and means for feeding material to be separatedbetween said pole and carrier. I

4. In a magnetic separator, a separating element having an approximatelyvertical ore-carrying surface arranged to move laterally, said surfacehaving ermeable magnetic teeth or projections, an non-magnetic materialfilling the spaces between said teeth to form inclined ledges projectingabove and beyond the ends of said teeth.

In witness whereof I hereunto subscribe my name this 13th day ofMarcli,A. D. 1905.

HENRY H. WAIT.

Witnesses:

IRVING MACDONALD, DE WITT C. TANNER.

